How to import OBJ files into Blender with script?
Try adding the trailing / to your directory path. You're searching for /home/yuerno/Downloads/test*.obj instead of /home/yuerno/Downloads/test/*.obj
Or better yet, use os.path.join to put the parts together:
# Specify OBJ files
model_files = glob.glob(os.path.join(model_dir, &quot;*.obj&quot;))